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<h2><b>oabin()</b></h2>
<p>
<code>oabin (<i>gexpr, sexpr &lt;,-flag&gt;</i>)</code>
<p>
This function bins station observations into grid cells based on their
location.  If more than one station is located within a grid box, the
observations are averaged together to produce the analyzed value.

<p>
<ul>
<code><i>gexpr&nbsp;&nbsp;&nbsp</i></code>a valid grid expression<br>
<code><i>sexpr&nbsp;&nbsp;&nbsp</i></code>a valid station data expression<br>
</ul>
<p>
The optional <code><i>flag</i></code> may be one of the following:
<p>
<ul>
<code>-f&nbsp;&nbsp;&nbsp&nbsp;&nbsp;&nbsp</code>set the value to the first observation that gets binned<br>
<code>-c&nbsp;&nbsp;&nbsp&nbsp;&nbsp;&nbsp</code>output is the # of stations located within each grid cell
</ul>
<p>

<h3>Usage Notes</h3>
<ol>
<li>The -f flag should be used when summing is not appropriate --
e.g. surface type classification.
<p>
<li>See the related function <a href="gradfuncoacres.html"><code>oacres</code></a>.

</ol>

<p>
<h3>Example</h3>
<p>
<pre>
open grd_var.ctl
open stn_var.ctl

set gxout grfill
d oabin(grd_var.1,stn_var.2)

set gxout grid
d oabin(grd_var.1,stn_var.2,-c)
</pre>


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